Using the Scan Tool
CODE RETRIEVAL PROCEDURE
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13.
If more than one DTC was retrieved, and to view Freeze Frame
Data, press and release the
DTC/FF
button, as necessary.
Each time the
DTC/FF
button is pressed and released, the Scan
Tool will scroll and display the next DTC in sequence until all
DTCs in its memory have displayed.
Freeze Frame Data (if available) will display after DTC #1.
In OBD2 systems, when an
emissions-related engine malfunction
occurs that causes a DTC to set, a
record or snapshot of engine
conditions at the time that the
malfunction occurred is also saved in
the vehicle’s computer memory. The
record saved is called Freeze Frame
data. Saved engine conditions include, but are not limited to: engine
speed, open or closed loop operation, fuel system commands,
coolant temperature, calculated load value, fuel pressure, vehicle
speed, air flow rate, and intake manifold pressure.
If more than one malfunction is present that causes more than
one DTC to be set, only the code with the highest priority will
contain Freeze Frame data. The code designated “
01
” on the
Scan Tool display is referred to as the PRIORITY code, and
Freeze Frame data always refers to this code. The priority
code is also the one that has commanded the MIL on.
Retrieved information can be uploaded to a Personal Computer
(PC) with the use of optional software (see instructions included
with the software for more information).
14.
When the last retrieved DTC has been displayed and the
DTC/FF
button is pressed, the Scan Tool returns to the “Priority” Code.
15.
Determine engine system(s) condition by viewing the Scan Tool’s
display for any retrieved Diagnostic Trouble Codes, code definitions and
Freeze Frame data, interpreting the green, yellow and red LEDs.
If DTC’s were retrieved and you are going to perform the repairs
yourself, proceed by consulting the Vehicle’s Service Repair
Manual for testing instructions, testing procedures, and flow
charts related to retrieved code(s).
If you plan to take the vehicle to a professional to have it
serviced, complete the PRELIMINARY VEHICLE DIAGNOSTIC
WORKSHEET on page 28 and take it together with the retrieved
codes, freeze frame data and LED information to aid in the
troubleshooting procedure.
To prolong battery life, the Scan Tool automatically shuts “Off”
approximately three minutes after it is disconnected from the
vehicle. The DTCs retrieved, Monitor Status and Freeze Frame
data (if any) will remain in the Scan Tool’s memory, and may be
viewed at any time by turning the unit “On”. If the Scan Tool’s
batteries are removed, or if the Scan Tool is re-linked to a
vehicle to retrieve codes/data, any prior codes/data in its
memory are automatically cleared.